Ai Ohto is a 14-year-old girl with striking heterochromia—one eye golden-amber, the other deep blue—a trait that led to bullying and isolation. Her short dark-blue hair is often partially hidden by her bangs, and she wears a yellow hoodie with a sunflower pattern. Haunted by guilt after her sole friend Koito Nagase’s suicide, Ai withdraws from the world and becomes fixated on reviving Koito through a cryptic system involving Wonder Eggs dispensed from a gachapon machine. Each egg transports her to a surreal dreamscape where she battles monstrous manifestations of trauma, including the Seeno Evils and Wonder Killers. Armed with a multicolored pen that morphs into a spiked mace, she also improvises weapons from ribbons, penlights, or prayer beads, aided by Leon, a chameleon-like companion hatched from a pomander gifted by the enigmatic arbiters Acca and Ura-Acca. Allied with Neiru, Rika, and Momoe—each wrestling with their own demons—Ai evolves from a timid recluse into a resolute protector. Her journey intertwines confronting guilt, shielding others in dream realms, and navigating real-world complexities, including her mother’s engagement to Shūichirō Sawaki, Koito’s former teacher. In a haunting parallel reality, an alternate Ai who never met Koito and succumbed to bullying sacrifices herself to save the original Ai. Ai’s relentless efforts yield a partial resurrection: Koito returns but without any shared memories. Undeterred, Ai later redirects her mission to revive Neiru after her apparent death. Her bedroom, adorned with calla lilies and morning glories, shifts from a solitary sanctuary to a communal haven for her friends, mirroring her emotional thaw.